Is it OK to mix oil viscosities?

yes you can mix same brand and type oils with different viscosity and it will be fine as long as you don't mix them 50/50. If you mix 200 ml of oil with the rest of oil needed for your engine you will be totally fine.
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Is it OK to mix oil weights?

Given that standards are in place, does that mean you can mix and match oil weights? The truth is simple: don't mix two different oils that have different weights (viscosities). Viscosity Grades might sound pretty scientific, but the simple fact is that this is what keeps your engine running smoothly.
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Can you mix viscosities of synthetic oil?

Yes. It won't harm your engine to mix, for example, Quaker State® motor oil with Pennzoil, as long as the oil you use is the weight (or viscosity) recommended in your vehicle owner's manual.
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Can you mix different viscosities of hydraulic oil?

"Is it all right to mix an R&O hydraulic oil with an AW hydraulic oil in a hydraulic application?" Mixing oils with different additive packages is never recommended. Doing so could compromise the additive performance of both constituents, cause corrosion of component surfaces and lead to increased mechanical wear.
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Is it OK to mix motor oil brands?

Yes, you can safely mix one brand of oil (e.g. Mobil 1) with a different brand (e.g. AMSOIL) or conventional oil with synthetic oil (in fact, that's what a synthetic blend is). Most synthetics today are fully compatible with conventional oils and can safely be mixed.
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Will Mixing 10 Motor Oils Damage an Engine? Let's find out!



Can I mix Castrol and Valvoline?

Q: Can I Mix Castrol And Valvoline? Mixing different oil brands is possible, so long as they are of the exact specifications. If you have Castrol 5w30 oil, mix it with Valvoline 5w30. There will be no problem when it comes to performance.
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What happens if you mix engine oil?

Mixing different types can destabilize your motor oil, reducing its efficiency and affecting your engine's performance. The smartest choice is to stick with the oil type and oil change intervals recommended by your car's manufacturer and visit your local car care experts for affordable services.
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Can you mix ISO 32 and ISO 46?

Yes as above no problems mixing them.
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Are all hydraulic oils compatible?

Although new hydraulic fluids may be compatible, in-service fluid of the same type may be degraded or contaminated to such an extent that the new fluid added may not be compatible with the system fluid.
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Can I mix Kubota UDT and UDT2?

Kubota UDT Fluid

Fully interchangeable with Super UDT2 fluids.
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Can you mix full synthetic and Nonsynthetic oil?

So, in the end, conventional and synthetic oils are comprised of the same, compatible components – it's just that the components in synthetics are much higher quality. While you can safely mix synthetic and conventional oils, you're doing nothing more than diluting the performance of the synthetic oil.
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Can you mix synthetic oils of same weight?

Viscosity is formulated into the synthetic, but there's no problem mixing. You can mix Synthetic and Mineral oils too, if you want.
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Can you mix 5w30 and 0w20?

Yes, just that. Pennzoil Platinum is a thin 30 or Valvoline Advanced also in 5w-30. Both syn oils. If you are in that part of NorCal where it's truly -10 or more, consider M1 AFE 0w-30.
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Is it OK to mix 10w30 and 10W40?

Mixing 10W30 with 10W40

Some say that mixing them is fine as long as you don't live in freezing weather. Even if you put together synthetic and conventional blends of these motor oils, they show no harm to your vehicle. However, this is true only if you mix in a quart of the other type to your usual engine oil.
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Will 10W 30 oil hurt a 5w30 engine?

Can I Mix 10w30 and 5w30? Most oils will mix perfectly, provided they have a similar synthetic. Therefore, there is no problem in mixing 10w30 and 5w30 since one will be topping up. Mixing the viscosity of oils will not have any effect on the engine.
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Can you mix synthetic and mineral hydraulic oil?

In its mildest form, mixing different lubricants may lead to a degradation of lubricant performance. Mixing the same API grades of synthetic passenger car motor oil and mineral oil-based engine oil won't damage the engine, but you will lose the performance features you expect from the synthetic.
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Is hydraulic fluid all the same?

Not all hydraulic fluid is the same.

Hydraulic fluid varies just as much as the fluids in your car. Hydraulic fluid can come from conventional oil, but it can also be formulated from synthetic stock. Hydraulic fluid can also be glycol-based, a water/glycol mix, or even nearly 100% water in some applications.
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Is ISO 32 and AW 32 the same?

These oils perform at the same grade as their ISO counterparts. An AW 32 hydraulic oil is going to be at 32cSt at 40°C for instance. The difference here is that there are additives contained within the oil.
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Which oil is thicker 32 or 46?

32 is thinner, No. 46 is medium and No. 68 is thicker. Generally speaking, if the temperature is low in winter, use #32 & #46 hydraulic oil with a lower viscosity, and use #68 hydraulic oil with a higher viscosity in summer.
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What is ISO 32 hydraulic oil used for?

Protects hard-working hydraulic systems from the stress of high-pressure, high-load and heavy-duty operations. Remains fluid in cold temperatures for immediate cold-weather flow. Special anti-wear additives and rust inhibitors provide optimum protection to expensive equipment.
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What does ISO 32 stand for?

ISO 32-46-68-100 Hydraulic Oil Temperature Range | Hydraulic Oil Specification Chart. What is hydraulic oil? Hydraulic oil (also known as hydraulic fluid) can be synthetic or mineral based. It's a non-compressible fluid that is used to transfer power within hydraulic machinery and equipment.
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What happens if you put 10w40 instead of 5w30?

Your vehicle does not use 5W-30 oil. The recommended oil viscosity for your vehicle, according to Kia documentation, is 10W-40. If you drive the vehicle in exceptionally cold weather, well below 32 degrees, you can use 5W-30 oil but even 10W-40 is still perfectly OK to use if outdoor temperatures are below freezing.
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Can you mix different types of oil?

The good news is that mixing different types of oil it will not harm your engine in any way in the short run. Most synthetic and semi-synthetic engine oils are based on regular oil and are compatible.
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Can I mix 10w30 with 20w40?

it will be too heavy you can damage the engine. I would not do that. if oil will go through very well it will not lubricate very well.
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